Mitsubishi Electric Mr.Slim MUZ-FE NA Series Service Manual page 20

PROGRAM TIMER
• OFF timer and ON timer can be used in combination. The timer of the set time that is reached first will operate first.
• " " and " " display shows the order of OFF timer and ON timer operation.
(Example 1) The current time is 8:00 PM.
The unit turns off at 11:00 PM, and on at 6:00 AM.
NOTE: If the main power is turned OFF or a power failure occurs while ON/OFF timer is active, the timer setting is can-
celled. As these models are equipped with an auto restart function, the air conditioner starts operating with timer
cancelled when power is restored.
8-9. EMERGENCY/TEST OPERATION
In case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the right side of the
indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of the
remote controller run down. The unit will start and AREA lamp (MSZ-FE09/12NA)/OPERATION INDICATOR lamp (MSZ-
FE18NA) will light.
The first 30 minutes of operation is the test run operation. This operation is for servicing.
The indoor fan runs at High speed and temperature control does not work.
After 30 minutes of test run operation, the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of
75°F (24°C). The fan speed shifts to Med.
All protective operations such as the coil frost prevention works even in the test run or the emergency operation.
In the test run or emergency operation, the horizontal vane operates in VANE AUTO (
Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any
signal from the remote controller. In case of latter, normal operation will start.
NOTE: Do not press EMERGENCY OPERATION switch during normal operation.
MSZ-FE09NA MSZ-FE12NA
MSZ-FE18NA
NOTE:
This is the indication of EMERGENCY OPERATION mode.
AREA setting is not available during EMERGENCY OPERATION.
PM
AM
Emergency
operation switch
(E.O. SW)
Emergency
operation switch
(E.O. SW)
(Example 2) The current time is 11:00 AM.
The unit turns on at 5:00 PM, and off at 9:00 PM.
Operation mode COOL
Set temperature 75°F (24°C) 75°F (24°C)
Fan speed
Horizontal vane
Vertical vane
Straight
MSZ-FE09/12NA
The operation mode is indicated by the AREA lamp as following
MSZ-FE09NA MSZ-FE12NA
AREA lamp L AREA
EMERGENCY
COOL
EMERGENCY
HEAT
STOP
MSZ-FE18NA
EMERGENCY COOL
EMERGENCY HEAT
STOP
20
PM
) mode.
HEAT
Med. Med.
Auto Auto
Straight
R
Lighted
↓
Not lighted
↓
↓
Lighted
Not lighted
↓
PM